Gas-stove.



PATENTED JUNE 27, 1905. T. G. EDWARDS.

GAS STOVE.

APPLICATION FILED JULY 9, 1902.

Q W. m m -7 mm a 0 o 0 w} 0 w Q/vihwomo Q r v l NITED STATES Patented June 27, 1905.

PATENT OFFICE.

THOMAS CROSS EDWARDS, OF BUFFALO, NEW YORK, ASSIGNOR TO EDWARDS PERFECTION SAD IRON COMPANY, A CORPORATION OF SOUTH DAKOTA.

GAS-STOVE.

SPECIFICATION forming part of Letters Patent No. 793,515, dated June 27, 1905.

Application file m 9, 1902. Serial No. 114,934.

To (all whom, it may concern: 7

Be it known that I, THOMAS Cnoss EDWARDS, a citizen of the United States, and a resident of Buffalo, in the county of Erie and State of New York, have invented a new and useful Gas- Stove, of which the following is a specification.

My invention relates to stoves that burn a mixture of gas and air for heating or boiling and cooking purposes, and has for its object to provide a structure that will effect more nearly perfect combustion than has been heretofore attainable and which will be available for combustion of natural gas in its crude condition with such a degree of completeness that no objectionable or deleterious products of combustion will result and no chimney or flue will be required.

My invention, while relating primarily to the combination of the burner, will be described, by way of illustration, in connection with a portable stove serving for both heating and cooking or boiling purposes, reference being made to the accompanying drawings, forming part of this specification, in which- Figure 1 is a central vertical section of the aforesaid illustrative stove in which my present invention is embodied. Fig. 2 is a bottom View of the outer shell on a reduced scale, and Fig. 3 is a vertical sectional view of the spheroidal mingling-chamber.

The illustrated embodiment comprises a base 1, formed with a dome 2; acentrally-rising feed-pipe 3, protruding through the dome and terminating in a jet-opening 4:; a spheroidal mingling-chamber 5, scr'ewed upon the upper end of the pipe 3 and having surface perforations 6, through which air enters in a plurality of intermingling currents, and bottom inlets 7, through which air enters from the dome 2, and upwardly-tapering flue 8, havingits base screw-threaded to a neck 9, formed on the spheroidal mingling-chamber and provided with exterior threads 10, while the flue terminates in a restricted discharge-opening 11; a mixing and heating globe 12, screwed upon the exterior threads of the flue and formed with an axial deflector 13, presented at the opening 11; a horizontal circumferential offset 14 and lower escape-openings 15; a

cup 16, conforming to the lower portion of the globe 12, screwed upon the flue 8, so that it is adjustable relatively to the globe to leave a wider or narrower passage 17, by which the inflammable mixture escaping through openings 15 is spread out into a thin sheet, and constructed with an annular flange 18, paralleling the offset 14 and forming therewith a radially-discharging mouth that directs the mixture outward in a thin sheet, and with perforations 19, that admit additional air to the mixture and keep the flange 18 from getting highly heated, and an outer sheet 20, screwed upon the fine 8, extending upwardly a suflicient distance to inclose the globe 12 and pro vided with a series of air-inlets 21 at bottom, through which air enters at atmospheric temperature.

In burning crude natural gas I have found it desirable to not only supply a suificiently large quantity of air to make the gaseous components highly inflammable and to thoroughly mix the air thus supplied with the gas, but also to provide for free ingress of air to the mixture at or near the combustion-point in order to insure consumption of the excessive impurities or particles held in suspension in the gas. I have also found that while combustion of the mixture is favored by a preliminary warming it is desirable to supply air to the gas in the first instance and also the excess of air to the mixture in a comparatively cold state in order that the quantity of oxygen procurable from the excess of air may not be cut down by attenuation due to increasing its temperature. Attenuation by heating of the combustible ingredient favors increase in the proportion of air taken up, and the cooler the air the greater its proportions also. Hence I introduce gas into the mingling-chamber 5, where it meets with a number of opposed currents of air entering at atmospheric temperature through the perforations 6 and 7 and throughout the surface of the spheroidal chamber, whence the mingled air and gas passes upward under the impetus of the gas and escapes through the opening 11, is deflected by the spreader 13, and passes in a thin sheet over the upper inner surface of the globe, which is kept hot by the flame above it. to be referred to. By this means the mingled gas and air becomes thoroughly mixed and heated. The hot mixture then escapes through openings 15 into the space 17 and is directed outward in a thin sheet by the offset 14 and flange 18. Additional air at atmospheric temperature reaches the warm mixture through perforations 19, and a considerable excess of cold air is directed upward across the thin sheet of air as it escapes past the flange 18, thus supplying the warm and inflammable mixture with sufficient additional air in cold state to insure complete combustion of the particles held in suspension in said mixture. Combustion takes place around the upper portion of the globe and heats the globe, as before alluded to.

22 represents a grid supported upon the shell 20 for receiving a receptacle or utensil. 23 is a crown which surmounts the stove when used for heating purposes and which, in addition to its ornamental effect, serves the function of increasing the heat-radiating surface.

Having thus described the invention, the following is what is claimed as new therein:

1. A gas-bu rner comprising a lower mixingchamber and means for admitting gas and atmospheric air to said chamber, a tubular exteriorly-threaded extension at the upper end of said chamber, and a gas-container having at its lower end a threaded neck adapted to screw onto said tubular extension, and at its upper end a raised or projecting preheater adapted to receive interiorly the end of said tubular extension and ignition openings around the base of said preheater.

2. A gas-burner having a lower mixingchamber and means for admitting gases thereinto, an exteriorly-threaded tubular extension at the top of said chamber and a funnel-like container screwing at its lower end on said tubular extension and having at its top an outer annual portion provided with ignitionopenings and at its center a preheater adapted to receive interiorly the upper extremity of the tubular extension and being raised above the said perforated outer portion.

3. In combination with a gas-burner, a mingling-chamber having air-inlets, a dome surmounted by said mingling-chamber, having perforations at top leading in to said minglingchambe'r, a gas-pipe extending through the dome and discharging into the lower part of the mingling-chamber, and a flue having its lower end located above the discharge of the gas-pipe conveying the mingled air and gas from said mingling-chamber.

4:. In combination with agas-burner, adome having perforations in its top, a spheroidal mingling-chamber surmounting the dome, receiving air through the perforations in the dome and having perforations distributed over its surface, and directing air inwardly toward the center of the chamber in a numberof intermingling streams, a gas-pipe projecting through the dome and discharging into the lower part of the chamber and a flue having its lower end located above the discharge of the gas-pipe conducting the mingled air and gas to be burned.

5. In combination with a gas-burner, a gassupply, a minglingchamber provided with openings, a flue leading from said minglingchamber, and a globular mixing chamber above the gas-supply therein into which the flue extends and havingadown wardly-extending s'preader,beneath which the flue discharges and having escape-openings at bottom.

6. In agas-burner, the combination of a gassupply, a mingling-chamber, a flue extending vertically from said mingling-chamber, a globular heating and mixing chamber, into which the flue extends, and within which the flue discharges at a point beneath its top, having escape-openings at bottom, and a cup surrounding the lower portion of the globe and forming therewith a restricted escape-passage opening at the upper edge of the cup.

7. In a gas-burner, the combination of gas and air supplies, a flue conducting the mingled air and gas, a globular mixing-chamber surmounting the flue, formed with bottom escape-openings and circumferential offset, and a cup conforming to the lower portion of the globular mixing-chamber and terminating adjacent to the offset therein.

8. In a gas-burner, the combination of gas and air supplies, a flue conducting the mingled air and gas, a globular mixing-chamber surmounting the flue, formed with bottom escape-openings and circumferential offset, and a cup conforming to the lower portion of the globular mixing-chamber and terminating in a horizontal flange adjacent to the offset therein.

9. In a gas-burner, the combination of the flue, the globular chamber into which the flue discharges, having escape-openings at bottom, and the cup conforming with said globular chamber; said globularchamber and cup being relatively adjustable to vary the space between them.

10. In a gas-burner, the combination of the flue, the globular chamber into which the flue discharges, having escape-openings at bottom, and the cup conforming with said globular chamber; said globular chamber and cup being threaded on the flue, and relatively adjustable to vary the space between them.

11. In a gas-burner, the combination of the flue, the globular chamber into which the flue discharges, having escape-openings at bottom, and the cup conforming with said globular chamber; said globular chamber and cup being formed respectively with the circumferential offset and a horizontal flange, and being adjustable relatively, as explained.

12. In a gas-burner, the combination of the flue, the globular chamber into which the flue discharges, having escape-openings at bottom, and the cup conforming With said globular chamber; said globular chamber and cup being formed respectively with a circumferential oflset and a horizontal flange, and the cup being provided With perforations at the base of said flange.

13. In a gas-burner, the combination of the flue,the globular chamber having escape-openings at bottom, the cup conforming to said globular chamber and spaced therefrom an equal distance throughout its inner surface, and the inclosing outer shell having air-inlets at bottom.

14. In a gas-burner, the combination of the flue,the globular chamber having escape-openings at bottom, the cup conforming to said globular chamber and spaced therefrom an equal distance throughout its inner surface, and the inclosing outer shell having air-inlets at bottom; said chamber, cup and shell being supported on the flue.

15. In a gas-burner, the combination of the fi ue,the globular chamber having escape-openings at bottom, the cup conforming to said globular chamber and spaced therefrom an equal distance throughout its inner surface, and the inclosing outer shell having air-inlets at bottom; and supporting a grill at top.

16. In agas-burner, the combination of the flue,the globular chamber having escape-openings at bottom, the cup conforming to said globular chamber and. spaced therefrom an equal distance throughout its inner surface, and the inclosing outer shell having air-inlets at bottom; and supporting a grill at top, and a crown surmounting said grill.

The foregoing specification signed this 20th day of March, 1902.

THOMAS CROSS EDWVARDS.

In presence of WILLET E. HAZARD, F. L. RoBERTs. 

